326X Series Modem Diagnostic Tests | Motorola and V.32bis, V.34-SDC

Troubleshooting

326X Series Modem Diagnostic Tests

The modem supports loopback, busy out, and retrain tests to assist you in isolating network problems. These tests analyze the telephone line and the local and remote modem’s performance. These tests can be initiated from the modem’s front panel, using AT commands from an attached PC or terminal, or from a network management system.

The following table shows the AT commands to initiate and terminate tests. The steps following the table describe how to initiate and terminate each test from the front panel. (Refer to your network management system documentation for instructions on initiating and terminating tests from the network management system.)

IMPORTANT: The tests described in this section cannot be run simultaneously. Because each test interrupts data flow in a network, notify equipment users at both the local and remote sites before starting tests.

For details on tests, refer to Chapter 4 of the 326X Series Modem Reference Guide.

		AT
Test	Description	Command

Local Analog	Tests the local modem’s transmit and receive circuits	&T1
Loopback	by looping local DTE data from the modem’s
	transmitter to its receiver.
Local Analog	Tests the local modem’s transmit and receive circuits	&T8
Loopback Pattern	with an internally generated test pattern.
Remote Digital	Using local DTE data, this test examines the transmit	&T6
Loopback	and receive circuits of the local and remote modems
	and the telephone line.
Remote Digital	Tests the transmit and receive circuits of the local and	&T7
Loopback Pattern	remote modems and the telephone line.
Data Mode Pattern	The modem uses internally generated test patterns to	Not
	provide data and separately test the inbound and	applicable
	outbound halves of the transmission path.
Local Digital	Using the remote DTE data for the test, the telephone	&T3
Loopback	lines and the remote modem circuits are tested.
Busy Out	Allows the modem to appear busy to incoming calls.	H1
Retrain	Lets you manually retrain local and remote modems.	O1
(Terminate)	Terminates any test in progress.	&T0

6-10 Troubleshooting Guide

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Motorola and V.32bis, V.34-SDC, 326X V.34 manual 326X Series Modem Diagnostic Tests, Test Description Command

Contents

Motorola Restricted Rights Notification for U.S. Government Users Proprietary Material Page Contents Installing the Modem Using the AT Automatic Calling Interface Appendix B. Cabling and Interface Pinouts Glossary Return Procedures Contents Using the Documentation Set Overview 326X Series Modem FamilyProduct Family Model Numbers This Model Number... Denotes Using the Documentation Set How to Use the Documentation SetDocumentation Target Audience 326X V.34 Series Modem Reference Card T0009-01 326X V.34 Series Modem User’s Guide T0009 References Trademarks326X Series Modem Reference Guide Using the Documentation Set Conventions Special Notices Messages spéciaux Mise en GardeAvertissement Besondere Hinweise Using the Documentation Set Avisos Especiales PrecaucionAdvertencia Xviii Motorola Information System Group ISG Customer Information Introduction Sales-Related Issues Information on Product Training Motorola ISG Customer InformationQuestions about Billing Comments about the Manual User Documentation Xxii Customer Response Card Business Reply Mail Contents Chapter Introduction From a network management system NMS Safety and Operational Notices Repair Operating the Modem from the Front Panel Lightning Selecting Programmed Option Sets Automatic Calling Interfaces ACUs25bis ACU ITU-T V.34 Compliant Modulation Mode Modulation Mode CharacteristicsManaging a Modem Restoring Data Transmission Synchronous Data Compression SDC Feature Automode/Multimode FeatureCompatibility in V.34 Modulation Mode Remote Configuration Error Correction and Data CompressionSecurity Status Snapshots Troubleshooting V.54 and V.22bis Tests Adaptive Rate SystemCountry-Specific Information NET Compliance Modem Installing the Modem Chapter Appendix C Appendix B Unpacking the Modem U.S.A Outside the U.S.AOne User’s Guide One Reference Card Additional Equipment Required Choosing a Site Connecting the Modem Rear Panel ConnectorsAn AC power switch Modular jacks for making Electrical Interfaces-EIA/TIA-232 and ITU-TS Operating at V.34 DTE Rates Ferrite Cylinders Models 3261 and 3266 Dial Line ConnectionsModels 3267 Modems Installing a Ferrite Cylinder on an Audio Cable Installing a Ferrite Cylinder on a DTE Cable Installing a Ferrite Cylinder on a Power Cable Installing a Ferrite Cylinder on a Power Cable Important Information About the Modulus Enclosure Front Door Important Information About the Modulus Enclosure Cabling the Modem 3265 Modem Cabling Connecting the Modem to a Network Management System Connecting to a 9110 NMS 11. Connecting Modems in a Daisy Chain Configuration Turning on the Modem After Installing the Modem Handling Error MessagesAutomatic Self-Test Self-Test Messages Installing the Modem Contents Getting Started System Requirements for Software Upgrades Configuring and Operating the ModemUsing the Front Panel If You Are Unsure of Your DTE’s Data Format 326x Ready 326X LEDsName Description Front Panel Display RC/NC Navigating the Configuration Menu Tree Setting Configuration Options from the Front PanelMenu Structure Front Panel Keys Example Accessing a Configuration Option Talk/Data SwitchStatus Displays Using the Modem with a Network Management System NMS Where Do I Go from Here?Operating Status Displays Option Sets/Dialing Options Using the AT Automatic Calling Unit ACU Using the Modem with an Async Terminal Using the Modem with a PC and Async Communications Software Selection, refer to Other Call Establishment Methods 25bis ACU for Sync or Async ApplicationsNetView LPDA-2 ACU for Sync Applications NetView LPDA-2 ACU for synchronous applications Sync Dialing from an IBM AS External Auto-Call UnitsPage Configuring the Modem Option Set 4-Synchronous Leased Line Applications with Configuring the Modem for Use with Communications Software Select the Modem’s Preconfigured Option SetCommunications Software Package Operating Notes Operating Notes General Notes Direct Operating Mode Set Modem Flow=Off Reinitializing Memory Using the AT&F Command Preparing for OperationIf the Communications Software and Modem Do Not Operate Reinitializing Memory from the Front Panel Configuration Option Sets What is an Option Set?Option Set Summary-326X V.32bis and V.34 Modems Option Set Summary-326X FAST-SDC Modem Option Set 1-Async Calls to Central Site Using the AT ACU Option Set Descriptions-326X V.32bis and V.34 Modems Option Set Descriptions-326X FAST-SDC Modems Option Set 2-Sync Dial A/B Restoral Option Set 3-Sync Dial Only Configuring an Option Set To create a customized option set Do not turn off modem power until Save COMPLETED! appears Option Set Defaults Option Set Defaults-326X V.32bis and 326X V.34 ModemsSave Changes=n Option Set Parameter 3260/62/65/67 3261/63/66/68 Terminal OPT’S XON/XOFF Option Set Defaults-326X-SDC V.34 Modem Option SetOption Option Set 3261/63/66/68 DTE Rate Auto 56.0 U.S. A., Canada Other countries Flow Ext Cntrl Pin Inactivity S30 326X V.32bis and 326XFAST Modem Application Examples For This Type of Application Select Option Set 1-Async Calls to Central Site Using AT ACU Changing Default Configuration Settings Option Set 2-Sync Answering Central Site Without ACU Option Set 3-Sync Calls to Central Site, V.25bis ACU Synchronous Dialing from an IBM AS 326XFAST-SDC Modem Application Examples Mode=Originate in the other modem Configuring the Modem for SDC Operation SDC Pre-Operation NotesOperational Requirements Optimizing Network Performance Ensuring Optimum Network Performance in SDC Mode SDC Option Set 1-Async Calls to Central Site Using AT ACUSDC Sample Applications SDC Option Set 2-Sync Dial A/B Restoral To 33.6 kbps SDC Option Set 3-Sync Dial Only X-SDC Dial-Only Application-Option Set Bandwidth On Demand Bandwidth On Demand-Option Set Point-to-Point Leased Line Application with Dial Restoral Select SDC Option Set 4 for this application Remote Access Reset When Remote Access Reset Is DisabledOperation Configuring the Modem Using the AT Automatic Calling Interface Industry-Standard AT Command Set-AT and AT What is the Attention AT Command Set? Using AT CommandsEntering AT Command Lines To enter a single AT command line To enter multiple AT commands on a single command line AT Command String ExamplesFor Further Detail on AT Commands Interpreting AT Command Strings Autobaud Feature Escape Sequence-+++Valid Autobauding Character Formats Start Bit Data Bits Parity Stop Bits Non-Configuration AT Commands To use the escape sequence with guard time Re-Execute Last Command ATA, Manual AnswerATD, Dial ATO, Leave Command Mode ATH, Hang UpATI, Display Software Information Registers AT*RD, Redial Last NumberDisplaying and Changing S-Register Values Display S-Register Value ATSn? Register Descriptions Display S-Register Value AT?Change S-Register Value ATSx=n Change S-Register Value AT=x Register 1-Ring Count Register 2-Escape Code CharacterRegister 3-Carriage Return Character Register 4-Line Feed Character Register 5-Backspace Character Register 6-Wait for Dial ToneRegister 7-Wait for Data Carrier Register 8-Pause Time for Pause Delay Dial Modifiers Register 10-Carrier Loss Hang Up Delay Register 18-Test Timer Register 11-DTMF Tone DurationRegister 12-Escape Code Guard Time Register 25-Delay Before Looking for DTR Register 26-RTS/CTS DelayRegister 30-DTE Inactivity Disconnect Register 38-Disconnect Buffer Delay Register 45-Access Security Tone DurationRegister 46-Access Security Lead Digit Delay Timeout Register 96-Signalling System #5 Register 97-Break Signal Duration Register 98-AC Detect Register 99-V.32 Training Time Troubleshooting Guide Troubleshooting Troubleshooting StepsAssumptions First Step Call Establishment Max Rate AT*MX Min Rate AT*MN Data Mode Flow control Call Termina Tion Fast Call=Off AT*FC0 in it Modem won’t connect 326X Series Modem Diagnostic Tests Test Description Command Synchronous Data Compression SDC Testing To initiate a test from the modem’s front panelPage Configuration Quick Reference Appendix a Configuration Quick-Reference-Menu Trees Configuration options and functionsFor More Detail Audience and Assumptions Figure A-1. The 326X Series Modem Menu Structure Part 1 Figure A-2. The 326X Series Modem Menu Structure Part 2 Figure A-3. The 326X Series Modem Menu Structure Part 3 Figure A-4. The 326X Series Modem Menu Structure Part 4 Dial From Stored #=nAsync Echo Volume SpeakerDial RsltCode Longspace Select Options Reinitialize Memory Guard ToneGuard Tone Display Modem ID Telco LineAT Form Pulse Cycle RTS signal from the DTE, set the modem RTS= Normal CTS ControlMode=Direct DSR Control Power Up ClockEnter Phone # Answer Asym Rate Ans Rest Auto Type Blind DialBreak Mode See the AT&Z command description Default DialingBuffer Delay =Off Off setting disables the Delay option Data Compression Dial WaitDial Wait DTE Rate RTS/CTS Delay Data FormTo D Pause Delay DTR DelayAuto Redial Stored# Flow Flow Control Hold DL Line DTE CtLine Compen To L Pstn Signaling LAL Busy OutLink Phone #’s Low Speed Modem Flow ModMin Rate AT Msg AT MessageMax Rate Maximum Rate Buffers Netwrk CompView Phone # Ext Cntrl Password OverspeedSet Protection Unlock Pass Restore Change PassWord Rmt Acc Parity ParityRTS Control Retrain Speed Conver Inactivity RTS/DCD Remote Signaling Throughput Minimization DelayRemRTS/DCD TpDlyMin Call Timeout Call TimeoutTone Length Tone Length Callback Feature Access security password from the remote modemDisplays only when selected by an NMS This command defines dial command limitations Password Verification Rem Num Rqrd Remote Number RequiredSim Ring Simulated Ringback Table A-2 Front Panel Configuration Options Sync Idle V25 RespLPDA2 Addr LPDA2 Det Group PW OverrideModeNC Address NC PortRate Performing Numeric Entry Front Panel Option Description Register/AT Command Cross-Reference Register AT Command Front Panel OptionTable A-3 Register Cross-Reference Dial Modifiers for Special Dialing Requirements Table A-4 Dial ModifiersModifier Function Description Table A-4 Dial Modifiers Result Codes Table A-5 Result Codes Connect Configuration Quick Reference A-43 Configuring the Modem’s Dual In-line Package DIP Switches Table A-6 Rear Panel SwitchesSwitch Number Setting Function Configuration Quick Reference A-45 Page Appendix B Cabling and Interface Pinouts 326X/326X-SDC cabling requirements and diagnostics Pin 232-D ITU Signal DefinitionEIA/TIA 232-D Modem to Computer Interface Table B-1 Modem/Computer Interface Connections Models 3261/3263/3266/3268 only. Signal passed from modem to ITU Recommendation V.35 Modem-to-Computer Interface Figure B-1 XFAST-SDC Series Modem with ITU V.35 Interface Pin Signal Definition ITU Rate V.35 Modem-to-Computer Interface PinoutsTable B-2 ITU V.35 Modem/Computer Interface Connections Dial LINE, Lease Private LINE, Phone Connector Pinouts Differences, EIA/TIA 232-D and ITU Rate V.35 Interfaces Table B-3 Network Control Port Connector Pinouts NC Network Control Port PinoutsCabling Cable Considerations Table B-4 Maximum Cable Capacitance per Data Rate Table B-5 Motorola DB-25 Low Capacitance Cables for Motorola Product Up to Description Code Kbps ft Kpbs ft DTE Cable Diagnostics Table B-6 Vendor Wire for Cabling and Interface Pinouts B-11 Page Appendix C Canada Country Support Installation Notes Restricted Features SummaryModels 3265/3266 All Models Setting AT Command AT*AA1 Feature Australia Austria Belgium Canada Czech Republic Feature Poland Denmark Finland France Feature Germany Hong Kong Ireland Israel Feature Italy Japan Malaysia Netherlands Feature Norway Portugal South Africa Spain AT*DD2 AT*DD3AT*DR1 AT*DR2 AT*DR3 AT*DR4 AT*LL Feature Sweden Switzerland United Kingdom Universal AT*DD4 AT*DD3AT*DD3 S7 AT*DD9 AT*DP AT*DR1 AT*DR2 AT*DR3 AT*LL Operating Notes Standalone Modem Rear Panel Views Dial Only Modem Modem Rear View Leased Line, Dial RestoralModem Rear Panel Dial Only Modem Rear Panel-View a Figure C-3.View a Rear Panel Layout 3265 Dial Only Modem Rear Panel-View B Modem Rear Panel-View CModem Rear Panel-View D Modem Leased Line with Dial Restoral For an Illustration of the Enclosure Card Backplane Wire Leased Line Interface Models 3260/3265 Rear Panel Interface PinoutsStandalone Models 3260/65 and 3261/66 Interface Pinouts Dial Line Interface Models 3260/3265 Phone Connector Interface Models 3260/3265 Wire Leased Line Interface Models 3261/3266Dial Line Interface Models 3261/3266 Table C-6 Wire Leased Line Interface Models 3261/3266 Phone Connector Interface Models 3261/3266 Card Models 3262/67, 3263/68 Backplane Interface PinoutsDial Line Interface All Card Models Table C-7 Phone Line Interface Models 3261/326 Wire Leased Line Interface Models 3262/3267 Wire Leased Line Interface Models 3263/3268Table C-9 Wire Leased Line Interface Models 3262/3267 Table C-10 Wire Leased Line Interface Models 3263/3268 Delayed and Forbidden Lists Australia-Delayed Call ListsAustria-Forbidden Call Lists Belgium-Delayed Call Lists Finland-Delayed Call Lists France-Delayed and Forbidden Call Lists Hong Kong-Delayed Call Lists Ireland-Delayed Call Lists Netherlands-Delayed Call Lists Norway-Delayed Call Lists Spain-Delayed Call Lists Other Country-Specific InformationCanada DOC Registration and Requirements Industry Canada Equipment Attachment Limitations Canadian Emissions Statement Table C-12 Dial Line Connector Pinouts for Jack Operation Table C-13 Phone Connector Pinouts for Jack OperationRear Panel Pinouts Modem Table C-14 Dial Line Connector Pinouts for Jack Operation Table C-15 Phone Connector Pinouts for Jack OperationTelco Option AT&J Denmark-Blind Dialing Hong Kong and United Kingdom-BABT RegulationsCompliance with BS6328 Part 1 1982 Section Compliance with BABTSITS/82/01/C and BABT/SITS/ 82005S/D Compliance with BS6305 Clause 6.2, BS6320 ClauseRinger Equivalence Number REN Compliance with BABT/SITS/83/08/A Clause Compliance with BS6789 .11986 Clause Compliance with DTI 83/009I Compliance with BS6301Compliance with Babt Sits 83/009 Section D Installation of Telephone Socket Application for Installation of Telephone SocketFCC Registration FCC Regulations Dial Line Jack Types Pin Voice Jack PermissivePin Data Jack Programmable Jack Type Description Table C-16 Dialline Connector Pinouts for Jack Operation Table C-17 Phone Connector Pinouts for Jack OperationJack Leased Connector Pin No Function Dial Line Telco Jack Selection Table C-18 Dial Line Connector Pinouts for Jack Operation Table C-19 Phone Connector Pinouts for Jack Operation Connecting an Exclusion Key Telephone Dial and Leased Line Transmit LevelsMaking Telephone-to-Modem Connections Dial Line Transmit Level Declaring The Jack Type RJ4MB4 Using the Modulus Backplane’s Busy Out Feature Table C-20. Backplane Pin Settings for Busy Out, Modulus Table C-21. Backplane Pin Settings for Busy Out, ModulusPin Pair Function A. and Canada Other UI Countries Modem a Modem B Country-Specific Information Glossary ACU CRC EIA ITU-TS Pstn SYN Return Procedures Equipment Return Procedures Expiration of LeaseFactory Repair Packaging Guidelines for Equipment Return Index DOC FCC Phone SDC Index-6